STC MCU EEPROM read and write

//************************************************ ****************   

// STC MCU EEPROM reading and writing--the simplest one, just use it and it will work. ^_^ Simplicity comes first!   

//------------------------------------------------ ----------------   

//--------------------------------//------------- ------------------   

//Note: The following are the addresses of the STC89 series   

//--------------------------------//------------- ------------------   

sfr isp_data = 0xe2; //Data register for ISP/IAP operation   

sfr isp_addrh = 0xe3; //high address   

sfr isp_addrl = 0xe4; //low address   

sfr isp_cmd = 0xe5; // Command mode register   

sfr isp_trig = 0xe6; // Command trigger register   

sfr isp_contr = 0xe7; //ISP/IAP control register   

*/   

/*   

//--------------------------------//------------- ------------------   

//Note: The following is the address of the 1T new STC series   

//--------------------------------//------------- ------------------   

sfr isp_data = 0xc2; //Data register for ISP/IAP operation   

sfr isp_addrh = 0xc3; //high address   

sfr isp_addrl = 0xc4; //low address   

sfr isp_cmd = 0xc5; // Command mode register   

sfr isp_trig = 0xc6; // Command trigger register   

sfr isp_contr = 0xc7; //ISP_IAP control register   

//------------------------------------------------ ----------------   

uchar eeprom_read(uint addres);//   

void eeprom_write(uint address,uchar wdata);//   

void eeprom_eares(uint addres); // sector erase   

//************************************************ ****************   

// sector erase   

//------------------------------------------------ ----------------   

void eeprom_eares(uint addres)   

{        

    uchar i;   

    isp_addrl=addres; //low address   

    isp_addrh=addres>>8; //high address   

    isp_contr=0x01;    

    isp_contr=isp_contr|0x80; //Set time and charge ISP operation.   

    isp_cmd=0x03; //sector command   

    isp_trig=0x46; //trigger   

    isp_trig=0xb9; //Trigger start.   

    for(i=0;i<3;i++)   

        ;   

    isp_addrl=0xff;   

    isp_addrh=0xff;   

    isp_contr=0x00;   

    isp_cmd=0x00;   

    isp_trig=0x00;    

}   

//************************************************ ****************   

// Read data   

//------------------------------------------------ ----------------   

unsigned char eeprom_read(unsigned int addres)   

{   

    unsigned char i,z;   

    isp_addrl=addres; //low address   

    isp_addrh=addres>>8; //high address   

    isp_contr=0x01;    

    isp_contr=isp_contr|0x80; //Set time and charge ISP operation.   

    isp_cmd=0x01; //write command   

    isp_trig=0x46; //trigger   

    isp_trig=0xb9; //Trigger start.   

    for(i=0;i<3;i++)   

        ;   

    isp_addrl=0xff;   

    isp_addrh=0xff;   

    isp_contr=0x00;   

    isp_cmd=0x00;   

    isp_trig=0x00;   

    z=isp_data;   

    return(z);           

}   

//************************************************ ****************   

// Write data   

//------------------------------------------------ ----------------   

void eeprom_write(unsigned int addres,unsigned char write_data)   

{   

    unsigned char i;   

    isp_data=write_data; //Data to be written.   

    isp_addrl=addres; //low address   

    isp_addrh=addres>>8; //high address   

    isp_contr=0x01;    

    isp_contr=isp_contr|0x80; //Set time and charge ISP operation.   

    isp_cmd=0x02; //write command   

    isp_trig=0x46; //trigger   

    isp_trig=0xb9; //Trigger start.   

    for(i=0;i<3;i++)   

        ;   

    isp_addrl=0xff;   

    isp_addrh=0xff;   

    isp_contr=0x00;   

    isp_cmd=0x00;   

    isp_trig=0x00;     

}